Plastic pervades the modern environment, notorious for its persistence and potential to shed nanoplastics — minuscule particles now under scrutiny for their long-term health implications. Dr. Wei Xu, an associate professor at Texas A&M College of Veterinary Medicine and Biomedical Sciences, focuses on nanoplastics’ interactions with seawater, where they acquire chemical and organic coatings.
Dr. Xu states, “When particles are released into the environment, they can interact with various materials that modify their surfaces, possibly including proteins, chemicals, and toxins. Most people are concerned with accidental ingestion of nanoplastics, but our work examines their potential to enter the body through the skin and what they might carry.”
Xu’s team recently demonstrated that nanoplastics with environmental coatings can infiltrate the skin’s defences at a microscopic level. “Particles with environmental coatings accumulated in specific cellular areas, successfully evading the cell’s ‘garbage disposal’ system,” Xu noted. These findings underscore the skin’s vulnerability to nanoplastics and the transformative role of environmental coatings.
To investigate environmental impacts, Xu’s team created nanoplastic beads exposed to ocean water before toxicity assessments. “We used water from the ocean off Corpus Christi to simulate environmental coatings,” Xu explained. Their research revealed that coated particles are more adept at avoiding immune responses compared to uncoated particles.
Xu’s work highlights the complexity of nanoplastic toxicology, noting that different coatings, such as those from algal blooms or contaminants from floods, could alter outcomes significantly. “We need better standardisation for research on nanoplastic particles,” Xu stressed, citing inconsistent results across studies due to varying consideration of environmental coatings.
Future research aims to analyse all coating types found in seawater. “Understanding the full scope of the problem is critical,” Xu asserted. The research paves the way for developing new strategies to mitigate health risks as environmental conditions evolve.
